Doesn't seem to plot Calendar spreads correctly.

[pursual]

[pursual]

Maybe integrate some dte logic like
https://github.com/atkrish0/OpStrat/blob/master/Strategies%20(Visualization)/Calendar%20Spread.ipynb

Anyone using a better options plotting lib?

[pursual]

I forked and added Calendar plotting using BS calc based off dtes
https://github.com/pursual/superOpStrat